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Content-Centric Networking (CCN) proposals rethink the communication model around named data. In-network caching is a fundamental feature to distinguish the CCN from the current host-centric IP network. In this paper, we have proposed a hybrid caching scheme which combines the on-path one and the off-path one. We leverage the ISOMAP manifold learning algorithm to distinguish the importance of nodes...
We study how to enable auctions in the big data context to solve many upcoming data-based decision problems in the near future. We consider the characteristics of the big data including, but not limited to, velocity, volume, variety, and veracity, and we believe any auction mechanism design in the future should take the following factors into consideration: 1) generality (variety); 2) efficiency and...
The explosion of mobile content and usage imposes enormous pressures on mobile communication networks. To reduce content delivery latency and to ease the burden on network bottlenecks (e.g., backhaul networks), besides upgrading the infrastructures, it is promising to cache popular contents at the edge-storage on BSs (Base Stations), APs (Access Points) or other third-party devices associated with...
It is widely accepted that with the rollout of LTE (Long Term Evolution), multiple 3GPP (3rd Generation Partnership Project) networks including GSM (Global System for Mobile communications) and UMTS (Universal Mobile Telecommunications System) will co-exist with LTE for a long time. Fixed spectrum allocation among multi-RAT (Radio Access Technology) networks cannot make sufficient use of spectrum,...
Many web service providers use commercial cloud computing infrastructures like Amazon for flexible and reliable service deployment. For these web service providers, the cost of cloud computing usage becomes a big part of their IT department cost. Facing the diverse pricing models including on-demand, reserved, and spot instance, it is difficult for web service providers to optimize their cost. This...
Mobile crowdsourced sensing (MCS) is a new paradigm which takes advantage of pervasive smartphones to efficiently collect data, enabling numerous novel applications. To achieve good service quality for a MCS application, incentive mechanisms are necessary to attract more user participation. Most of existing mechanisms apply only for the offline scenario where all users' information are known a priori...
We investigated the adaptive power allocation in an point-to-point orthogonal frequency Division multiplexing (OFDM) cooperative system subject to the individual power constraint with an objective of maximize the sum transmission rate, and derived the optimal power allocation by assuming independent and identically distributed (i.i.d.) sub-channels in each Decode-and-Forward (DF) relay. To improve...
Most existing works on scheduling for cooperative OFDMA systems have focused on homogeneous users with the same service and demand. Although scheduling for service differentiated cooperative OFDMA systems have been discussed in some previous works, their schedule problems do not take the joint optimization of base-station and relay power into account. In this paper, we investigate the optimization...
The success of emergency supplies response often needs collaborative cooperation between related emergency departments. Because of its functions on emergency supplies response, the response process can be high efficiency. This paper mainly illustrates the processes of collaborative allocation of emergency supplies under power grid emergency. It is a research on finding out the failure factors which...
We study the spectrum market equilibrium where multiple spectrum channels are available, and each of the secondary users has an initial endowment. Assume that each user, with a given endowment, is interested in buying spectrum channels over a specified set of geometric regions in the Euclidean plane. Regions may overlap, thus creating sub- regions where each subregion has a unique set of users interested...
We propose efficient spectrum channel allocation and auction methods for the online wireless channel scheduling. Assume that each user requests for the exclusive usage of a number of wireless channels for a certain time interval. The scheduler has to decide whether to grant its exclusive usage an how much will be charged. To possibly serve users with higher priority, preemptions are allowed with penalties...
In UMTS cellular networks, Common Pilot Channel (CPICH) signals are broadcast by base stations for channel estimation and cell selection. The strength of CPICH signal determines cell coverage and pilot pollution to neighboring cells; pilot power allocation thus involves a tradeoff between coverage and interference. In this paper, we study the issue of pilot power management in closed-access High-Speed...
In this paper, we develop a simulation tool to study the performance of hybrid femtocell access in a High-Speed Downlink Packet Access (HSDPA) network. A hybrid resource allocation scheduler is developed in order to balance the tradeoff between open and closed femto access strategies. Performance in terms of macrocell traffic offloading is investigated under the dynamic configuration of a network...
Maintenance plays an important role in keeping the availability of civilian and military equipments at a satisfactory level. The issue, which decision maker is most concerned about, is how to keep the availability at a satisfactory level with less maintenance cost. In this study, we propose a simulation-optimization approach to spare parts allocation based on decision-maker's satisfaction. Firstly,...
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